Mask



Oct. 20, 1931. F, J. MCMICHAEL 1,828,427

MASK

Filed Dec 20, 1928 2 Sheets-Sheet 1 Oct. 20, 1931. r-. J. MCMICHAEL MASK Filed Dec. 20, 1928 2 Sheets-Sheet 2 awucni'o a J M Mz'ciz (295 Patented Oct. 20, 1931 UNITED v PATENT. OFFICE FLOYD .I. MCMICHAEL, or BROWNSVILLE, Texas MASK Application filed'December 20, 1928. Serial No. $327,351;

' 5 structed that it can be easily and quickly placed over the head, the construction being such that when in place all parts of the head will be thoroughly protected;

Another object of the invention is to provide a device of this kind wherein the chemical containing canister is carried by the crown portion of the device in order that the use of straps and belts will be eliminated, as now customary in devices of this character which are constructed in such manner that the chemical containing canister is secured t the body of the user. 7

Another object of he invention is to provide a mask so constructed that the chemical containing canister can be easily and quickly attached or removed from the crown of the mask, as the occasion requires.

Another object of the invention is to provide a mask so constructed. that the'incoming air will pass through the eye cups to prevent fogging of the lens thereof.

Another object of the invention is to provide a mask which will prove efiective against poisonous gases, smoke and sparks.

Another object of the invention is to provide a mask so constructed that the chemical containing canister will be located upon the crown of the mask in order that the head.

of the wearer will be protected against injury from falling timbers or other objects.

Another object is to place the chemical containing canister on the crown portion of the device instead of securing it to the hodv of the user in order to shorten the air tube leading from the canister to the mask.

Another object of the invention is to provide a device of this character which is simple in construction, efficient in operation, and one which can be manufactured at a small. cost.

With these and other objects in view, this invention resides in the novel features of construction, formation combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which I Figure 1 is a front view of the device.

Figure 2 is a side elevation thereof;

Figure 3 is a vertical sectional view through the device.

Figure 4: is adetail view, partly in section, showing the interior construction of one of the securing devices. Figure 5 is a sectionalview on line 55 of Figure 1. I

Figure 6 isa detail'sectional view of a valve connection. 1 j

Referringto the drawings, 1 designates a mask which is in the form of a hood, and

comprises a front section'2 formed preferably from comparatively thick material and to which is connected the rear section 3, the latter section being formed from elastic material. The front section 2 includes a crown'section 4', while the rear sect-ion is provided with aneck band 5 formed fromfluted elasticfabricin order that it willfit closely around theneck of the user.

Riveted to the crown section 4 is a sheet metal plate 6, the side edges of whichtermin atefin upwardly curved flanges 7, and to each r flange is pivotally "connected, as at S, a pair of cylinders9, saidcylinders having-coil springs 10 therein. Slidable inthecylinders I are rods 11 provided upon their 'lowerends with heads 12 for engagement with the lower ends of the springs 10. The upper ends of the rods 11 are provided with hooks 13 and finger pieces 14:, the purpose of which will appear later.

The chemical-containing canister 15 has fixed to its sides catches 16 adapted to beengaged'by the hooks 13, and when thus engaged thecanister will be .yieldably held mounted upon the plate '6. The canister is provided 7 with a marginal ledge 17 adapted to overhang the crownsection 4, and serves as additional protective means for the head of the wearer.

A pair of cups 18 are secured to the front section 2 and'rcarry lens 19 in order that ob servations can be clearly made. The cups have nipples 20 carried thereby andto which are connected the lower ends of the air tubes 21, said tubes having theirupper ends connected to a'manifold 22. To .the manifold is connected the lowerend of the tube23 which has its upper end detachably connected with the canister in order that air drawn through the canister will enter the manifold.

The section 2 has a nipple 24 depending therefrom and in which is fitted the upper flared end of the sleeve 25, said sleeve being fixed medially in the bar 26. The lower flared end of the sleeve is fitted in the upper portion of the exhalation valve 27, which is of the flutter type commonly used on devices of this character. A protective frame 28 is supported by the bar 26 and confines the valve 27.

Since the incoming air passes through the cups 18 fogging thereof will be prevented. The incoming fresh air will be obviously 1nhaled by the user, and the exhaled air will be dispelled through the valve 27.

In order to protect the head of the wearer the inner surface of the crown section 4 is lined with felt or other suitable padding material.

The canister 15 can be readily attached or detached when necessary, and when in place obviously serve to protect the head against falling objects. When it is desired to remove the canister 15 it is only necessary to grasp the finger pieces 14 and pull upwardly thereon, thus raising the hooks 13 from engagement with the catches 16. The tube 23 has its upper end secured to the canister by a clamping band 28, which when released permits the complete separation of the canister from the mask.

In order to admit fresh air to the canister ports 29 are formed therein.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to thoseskilled in the art, without further description, and it will be understood that various changes in the size, shape, and proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What is claimed is 1. A device of the class described comprising a mask of hood-like form and including a front section and a crown section, a plate fixed to the crown section, a canister, catches carried by the canister, spring restrained hooks connected with the plate for detachably and yieldably engaging the catches to hold the canister upon the plate, and means for conducting air from the canister into the mask.

2. A device of the class described comprising a mask of hood-like form, and including a front section and a crown section, a plate fixed to the crown section, cylinders pivotally connected with the plate and having spring restrained rods slidable therein, hooks carried bythe rods, a chemical containing canister removably mounted upon ably mounted upon the plate, a tubular connection between the container and eye cups detachably connected therewith, and an exhalation valve depending from the lower part of the front section.

In testimony whereof I afiix my signature.

FLOYD J. MoMICHAEL. [1,. s.] 

